de camp



(No Model.) a Sheets-Sheet 1. G. DE CAMP.

DYNAMO ELECTRIC MACHINE. No. 540,351. Patented June 4, 1895.

(No Model.) 3 Sheets8heet 2. G. DE CAMP.

DYNAMO ELECTRIC MACHINE.

No. 540,351. Patented June 4, 1895.

win Lama 51 new 6oz 25m x vmi (No Model.) 8 Sheets-Sheet 3. G. DE CAMP.

DYNAMO ELECTRIC MACHINE.

No. 540,351. Patented June 4, 1895.

i 5 "11h ""HIL' UNITED STATES PATENT OFFICE.

GEORGE DE CAMP, OF ST. LOUIS, MISSOURI, ASSIGNOR TO THE ATWOOI) ELECTRICCOMPANY, OF SAME PLACE.

DYNAMO-ELECTRIC MACHlNE.

SPECIFICATION forming part of Letters latent No. 540,351, dated June a,1895.

Application filed September 24, 1894:. Serial No. 523,948. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE DE CAMP, a citizen of the United States,residing at the city of St. Louis, in the State of Missouri, haveinvented certain new and useful Improvements in Dynamo-ElectricMachines, of which the following is such a full, clear, and exactdescription as will enable any one skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, forming part of this specification.

My invention relates to new and useful improvements in dynamo electricmachines, and

the main object is to provide such a machine which will require aminimum amount of space and at the same time one that will furnish amaximum amount of power. This class of dynamo is specially desirable foruse in electric head-lights for locomotives, and places where but littlespace is available for the lightin machinery, and where great power isrequired in proportion to the size of the machine.

In the drawings, where the preferred form of my dynamo is shown, Figurelis a side elevation showing the dynamo formed or constructed on one endof an engine-bed, the engine itself, with the exception of thefly-wheel, being broken away. Fig. 2 is a front or end view of the same.Fig. 3 is a rear end view of the dynamo, the bed and armature-shaftbeing in section and the fly-wheel removed.

In all the views where the same marks of reference refer to the sameparts, 5 is the base of the dynamo and 6 the lower pole piece which maybe cast or formed integral with the base 5.

7 are the field-magnet cores which are also cast or formed integral withthe base 5 and are shown in dotted lines in Fig. 3.

8 is the upper pole piece which is formed integral with the dynamo capplate 9, this cap plate being bolted to the field-magnet cores afterthey have been wound.

The field-magnet coils are alongside of and parallel with the polepieces and in close proximity thereto, as shown in Fig. l.

10 is a main shaftboxing which is supported from a base piece 11 formedintegral or secured to the base 5 of the dynamo, the base piece 11 beingbetween the two field-magnet coils. (See Fig. 3.)

12 is the main shaft of the machine, and is carried in the boxing 10.secured on the shaft on one side of the boxing to revolve between thepole pieces 6 and 8 and parallel with the field-magnet coils, the flyWheel 1% of the engine being mounted on the shaft 12 on the other sideof the boxing 10 to balance the armature.

15 is the commutator which is in the form of a flat ring secured to thearmature'hub and is in this case, a double one for both are andincandescent lighting.

16 are the brush holders which are preferably fiat and are hinged orpivoted to an insulating plate 17 secured to the base 5 of the dynamo,springs 18 being provided to hold the brushes against the commutator.

19 are the circuit wires of the arc-circuit and 20 those of theincandescent-circuit and are attached to the brush holders in the usualmanner.

In the dynamo herein shown, the engine is to be connected directly withthe main shaft 12 of the dynamo, 1% being the fly wheel of the engine.

In constructing an electric motor in accordance with my invention, thedrive wheel of the motor would take the place of the fly wheel and theshaft would be cut off beyond the drive wheel. The armature beingparallel with and at the side of the field-magnet coils, allows of anarmature of large size, and does not extend the machine laterally beyondthe armature, thus securing economy of space in this direction. Thecommutator being on the face of the armature hub, but little space istaken up beyond the face of the armature, and with the side shaft boxingbetween the field-magnets only one boxing is required, whether theconstruction be applied to a dynamo or to a motor, thereby economizingspace The armature 13 is longitudinally, 2'. e., in the other direction9 also. The upper pole piece being bolted to the field-magnet cores, andthey being formed integral with the dynamo base, the whole is strong andrigid. By the construction set forth there are also fewer parts to themachine roe than those in ordinary use, making the dynamo cheap toconstruct, simple and not likely to break down or get out of order.

Having fully set forth my invention, what I desire to claim and secureby Letters Patent of the United States is 1. In a dynamo electricmachine, a shaft having bearings between the field-magnets, an armaturemounted on such shaft at one side of the field-magnets, and a fly ordrive wheel mounted on such shaft on the opposite side of thefield-magnets from the armature and balancing the same, such armatureand fly wheel adapted to revolve parallel to the field-magnet coils.

2. In a dynamo electric machine, a base plate, field-magnets whose coresare formed integral with such base, a bearing between suchfield-magnets, a shaft mounted. therein, an armature mounted on suchshaft to revolve parallel to and alongside of such field-magnets, andpole pieces, one formed integralwith the base of the machine and theother with the cap piece, such cap piece fixed to the cores of saidfield-magnets.

3. In a dynamo electric machine, a base, field magnets, their coresformed integral with such base, a cap plate rigidly secured to the topof such cores, pole pieces, one formed on such cap piece and the otheron said machine base at the side of and parallel with subscribingwitneses.

GEO. DE CAMP. [L. s] Witnesses:

A. O. FOWLER, J. F. WEsToN.

